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Multi-object optimization design for differential and grading toothed roll crusher using a genetic algorithm

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Journal of China University of Mining and Technology 2008年第2期18卷 316-320页

作者： ZHAO la-la WANG Zhong-bin ZANG Feng School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou Jiangsu 221008 China

Our differential and grading toothed roll crusher blends the advantages of a toothed roll crusher and a jaw crusher and possesses characteristics of great crushing,high breaking efficiency,multi-sieving and has,for the moment,made up for the short- comings of the toothed roll *** moving jaw of the crusher is a crank-rocker *** optimizing the dynamic per- formance and improving the cracking capability of the crusher,a mathematical model was established to optimize the transmission angleγand to minimize the travel characteristic value m of the moving *** algorithm is used to optimize the crusher crank-rocker mechanism for multi-object design and an optimum result is *** to the implementation,it is shown that the performance of the crusher and the cracking capability of the moving jaw have been improved.

关键词： differential and grading toothed roll crusher crank-rocker mechanism genetic algorithm multi-object optimization

Rheology Study of Suspension Formed by Different Nano-size Y-TZP

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Journal of Materials Science & Technology 1997年第4期13卷 348-350页

作者： Sun, J Gao, la Guo, JK CHINESE ACAD SCI SHANGHAI INST CERAMSHANGHAI 200050PEOPLES R CHINA

The rheological properties of slurries formed by different nano-size Y-TZP have been studied. The viscosity is sensitive to solid loading especially for high solid content level. The dispersant NH(4)PAA can improve the flowability efficiently. The smaller ceramic particles need to adsorb more dispersant to the flowability. Under the same solid content, the smaller the particles, the higher the viscosity of its slurry.

关键词： Rheology

Flexible Transparent Near-Infrared Photodetector Based on 2D Ti_(3)C_(2) MXene-Te Van Der Waals Heterostructures

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Chinese Journal of Chemistry 2021年第8期39卷 2141-2146页

作者： Chuqiao Hu la Li Guozhen Shen Key laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences&Center of Materials Science and Optoelectronic EngineeringUniversity of Chinese Academy of SciencesBeijing 100083China

Ti_(3)C_(2) MXe ne servi ng as superior electrical con ductors prese nts more specific performa nee such as tran spar ency,con ductivity tha n gold(Au),and even could form a heterostructure with active materials of the functional ***,a Ti_(3)C_(2) MXene-Te microplate van der Waals heterostructure based tran spare nt near-i nfrared photodetector(PD)is exploited.

关键词： Semiconductors Ti_(3)C_(2)T_(x)MXene Transparent electronics Tellurium Flexible near infrared photodetector Conducting materials

ON A THEOREM OF BERNSTEIN AND ITS APPLICATIONS TO WEIGHTED MINIMAX SERIES

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Journal of Computational Mathematics 1998年第6期16卷 509-520页

作者： Francisco Perez Acosta(Departamento de Analisis Matematico, Universidad de la laguna, la laguna 38271,Canary Islands, Spain) Univ la laguna Dept Anal Matemat E-38271 La Laguna Canary Isl Spain

In this paper, some results about approximation in a norm S induced by the minimax series are studied. Then a Bernstein-type theorem for the norm S is established. Finally the Bernstein theorem is applied to prove the... 详细信息

关键词： Approximation theory polynomials Bernstein theorem minimax series.

Digit Sets for Self-similar Tiles

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Acta Mathematicae Applicatae Sinica 2015年第2期31卷 493-498页

作者： Yu-Mei XUE la-na LI School of Mathematics and System Sciences and LMIB Beihang University

A new class of digit sets, which we called very weak product-form digit sets, is introduced and it is shown that they are tile digit set for self-similar tiles. This extends previous results about product-form and wea... 详细信息

关键词： self-similar tile product-form digit set weak product-form digit set very weak product-form digit set

Truly optimal semi-active damping to control free vibration of a single degree of freedom system

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 142-145页

作者： Viet Duc la Ngoc Tuan Nguyen Institute of Mechanics Vietnam Academy of Science and TechnologyHanoi 10000Vietnam Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoi 10000Vietnam

This paper studies a single degree of freedom system under free vibration and controlled by a general semiactive damping.A general integral of squared error is considered as the performance index.A one-time switching damping controller is proposed and *** pontryagin maximum principle is used to prove that no other form of semi-active damping can provide the better performance than the proposed one-time switching damping.

关键词： Analytical optimization Quadratic integral Lyapunov equation Pontryagin maximum principle

Cosmology with Two Compactification Scales

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Chinese Physics Letters 2000年第4期17卷 310-312页

作者： A.G.Agnese M.la Camera Dipartimento di Fisica delPUniversita di Genova Istituto Nazionale di Fisica NucleareSezione di Genova Via Dodecaneso 3316146 GenovaItaly

We consider a(4+d)-dimensional spacetime broken up into a(4-n)-dimensional Minkowski spacetime(where n goes from 1 to 3)and a compact(n+d)-dimensional *** the present time the n compactification radii are of the order... 详细信息

关键词： manifold. length. Minkowski

All-Ti3C2TA:MXene Based Flexible On-chip Microsupercapacitor Array

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Chemical Research in Chinese Universities 2020年第4期36卷 694-698页

作者： LI la CHEN Di SHEN Guozhen State Key laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences&Center of Materials Science and Optoelectronic EngineeringUniversity of Chinese Academy of SciencesBeijing 100083P.R.China School of Mathematics and Physics University of Science and Technology'BeijingBeijing 100083P.R.China

Flexible on-chip microsupercapacitors(MSCs)are highly desired for integrated wearable or portable elec-tromics due to their advantages of small size,high power density,easy integration,long lifespan,high security,and *** output voltage of MSCs can be improved by designing MSC arrays,which could further expand their application *** this work,we proposed a facile laser direct cutting method to prepare an on-chip flexible MSC array using TiC,T,MXene as both current collector and electrode *** designed MSC in PVAH2SO4 all-solid-state gel electrolvte exhibits a large volume/areal capacitance of 770.72 F/cm^3(46.24 mF/cm^2)at a scan rate of 20 mV/s,a high energy density of 68.51 mWh/cm^3 at a power density of 6.16 W/cm^3,excellent cveling stability with capacitance retention of 98.50%after 10000 charge/discharge *** MSC also shows superior flexibility and stabilitv even after repetition of charge/discharge cvcles under the convex and concave bending *** *** assembled MSC array(4 in series)provides a high voltage of 3.2 V,which could easily power a purple light-emitting diode more than 10 min,demonstrating its potential application in integrated portable/wearable devices.

关键词： Ti3C2Tx MXene Microsupercapacitor laser cutting Flexible energy storage

Two upper bounds for the Erdos-Hooley Delta-function

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Science China Mathematics 2023年第12期66卷 2683-2692页

作者： Regis de la Breteche Gerald Tenenbaum Institut de Mathematiques Universite Paris CiteSorbonne UniversiteCNRSParis F-75013France Institut Elie Cartan Universite de LorraineVandoeuvre-les-NancyBP 70239France

For integer n≥1 and real u,let Δ(n,u):=|{d:d] n,e^(u) 详细信息

For integer n≥1 and real u,let Δ(n,u):=|{d:d] n,e^(u)

关键词： concentration of divisors average order normal order Waring’s problem